Global Patent Index - EP 1801099 A1

EP 1801099 A1 20070627 - Dithiol mixtures in order to remove horny substances of skins

Title (en)

Dithiol mixtures in order to remove horny substances of skins

Title (de)

Dithiolmischungen zum Entfernen von Hornsubstanzen aus Häuten

Title (fr)

Mixtures dithioles pour enloigner des composés cornés des peaux

Publication

EP 1801099 A1 20070627 (DE)

Application

EP 07104119 A 20040910

Priority

  • EP 04765052 A 20040910
  • DE 10343252 A 20030917

Abstract (en)

Process for preparation of bisepoxides involving reaction of a conjugated diene of formula (I) in the presence of a catalyst with at least one peroxide, using up to 4 peroxide equivalents per C-C bond equivalent. Process for preparation of bisepoxides involving reaction of a conjugated diene of formula (I) in the presence of a catalyst with at least one peroxide, using up to 4 peroxide equivalents per C-C bond equivalent. The catalyst is obtainable by contacting at least one manganese compound of formula (A)-(D) with at least one ligand L of formula (II). A 2MnX 4 AMnX 3 (A) MnY (B) MnX 2 (C) MnX 3 (D) [Image] R 1>H, 1-12C alkyl, optionally substituted by one or more S-H or OH groups; X : monovalent anion; Y : divalent anion; A : alkali metal or ammonium, which can be alkylated; R 2>1-20C alkyl, at least one co-ligand, derived from monocarboxylic acids, 2- or multivalent carboxylic acids or diamines. Independent claims are included for: (1) production of dithiol from bisexpoxide; (2) a dithiol mixture containing: (A) 55-65 mol% erythro-dithiol; and (B) 35-45 mol% threo-diol of formula (IV); and their corresponding alkali metal and ammonium salts; (3) an aqueous solution containing dithiol mixture; (4) a process for removal of horny substances from the skins of dead animals using a dithiol mixture or an aqueous solution of it. [Image].

IPC 8 full level

C07C 323/19 (2006.01); C07C 321/04 (2006.01); C07C 323/12 (2006.01); C07D 301/12 (2006.01); C07D 303/12 (2006.01); C07D 303/34 (2006.01); C07D 407/04 (2006.01); C14C 1/06 (2006.01)

CPC (source: EP US)

C07C 323/12 (2013.01 - EP US); C07D 407/04 (2013.01 - EP US)

Citation (applicant)

Citation (search report)

[DA] DE 2131630 A1 19720105 - AVON PROD INC

Designated contracting state (EPC)

AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IT LI LU MC NL PL PT RO SE SI SK TR

DOCDB simple family (publication)

WO 2005033070 A2 20050414; WO 2005033070 A3 20050623; AR 045588 A1 20051102; AT E399764 T1 20080715; AT E501116 T1 20110315; BR PI0414391 A 20061121; CN 100364967 C 20080130; CN 101037407 A 20070919; CN 101037407 B 20100915; CN 1852892 A 20061025; DE 10343252 A1 20050421; DE 502004007508 D1 20080814; DE 502004012296 D1 20110421; EP 1663964 A2 20060607; EP 1663964 B1 20080702; EP 1801099 A1 20070627; EP 1801099 B1 20110309; ES 2308225 T3 20081201; ES 2361627 T3 20110620; US 2006277687 A1 20061214; US 2009149666 A1 20090611; US 7527652 B2 20090505

DOCDB simple family (application)

EP 2004010123 W 20040910; AR P040103182 A 20040906; AT 04765052 T 20040910; AT 07104119 T 20040910; BR PI0414391 A 20040910; CN 200480026990 A 20040910; CN 200710104781 A 20040910; DE 10343252 A 20030917; DE 502004007508 T 20040910; DE 502004012296 T 20040910; EP 04765052 A 20040910; EP 07104119 A 20040910; ES 04765052 T 20040910; ES 07104119 T 20040910; US 36982509 A 20090212; US 57177206 A 20060315